'perf record -e random:debit_entropy -e random:credit_entropy_bits --call-graph dwarf -a -D 1000 -T sleep 120; perf script' output on host when booted into runlevel 's'
'perf record -e random:debit_entropy -e random:credit_entropy_bits --call-graph dwarf -a -D 1000 -T sleep 120; perf script' output on host when booted into runlevel '3'
perf record -e random:debit_entropy -e random:credit_entropy_bits --call-graph dwarf -a -D 1000 -T sleep 120; perf script' output on guest when booted into runlevel '3'